PIC18C858-E/L Microchip Technology, PIC18C858-E/L Datasheet - Page 212

• Manufacturer Part Number: PIC18C858-E/L
• Description: IC MCU OTP 16KX16 CAN 84PLCC
• Manufacturer: Microchip Technology
• Series: PIC® 18Cr

Specifications of PIC18C858-E/L

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 68
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: OTP
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 84-PLCC
• For Use With: AC164310 - MODULE SKT FOR PM3 84PLCCDVA18XL840 - ADAPTER DEVICE ICE 84PLCCAC174012 - MODULE SKT PROMATEII 84PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: PIC18C858E/L

PIC18CXX8
FIGURE 17-2: TRANSMIT MESSAGE FLOWCHART
DS30475A-page 212
The TXIE bit determines if an inter-
rupt should be generated when a
message is successfully transmitted.
Generate
Interrupt
Examine TXPRI <1:0> to
Determine Highest Priority Message
Yes
No
Clear: TXABT, TXLARB,
Begin transmission (SOF)
Message Transmitted
to start transmission
CAN bus available
and TXERR
Set TXREQ = 0
Successfully?
TXBUFE = 1
Yes
TXIE = 1?
TXREQ
Are any
Start
bits = 1
END
Was
Set
Is
?
?
Is
Yes
Yes
Advanced Information
No
No
The message transmission sequence begins when
the device determines that the TXREQ for any of the
transmit registers has been set.
TXLARB = 1?
or TXABT = 1
TXREQ = 0
TXERR = 1
No
No
Set
Is
is
?
TXREQ = 0
Clearing the TXREQ bit while it is set, or setting
the ABAT bit before the message has started
transmission will abort the message.
ABAT = 1
Is
?
Yes
Yes
Yes
Abort Transmission:
Set TXABT = 1
Arbitration lost during
No
transmission
A message can also be
aborted if a message
error or lost arbitration
condition occurred during
transmission.
2000 Microchip Technology Inc.